/Engine/Source/Runtime/Core/Public/Misc/ConfigTypes.h
This describes extra files per layer, to deal with restricted and NDA covered platform files that can't have the settings be in the Base/Default ini files. Note that we treat DedicatedServer as a "Platform" where it will have it's own directory of files, like a platform
struct FConfigLayerExpansion
const TCHAR ...
After1
const TCHAR ...
After2
const TCHAR ...
Before1
A set of replacements from the source file to possible other files
const TCHAR ...
Before2
EConfigExpansio...
Flags